题目内容
19.Wehave been fishing(fish) all the afternoon,but we haven't caught any fish yet.分析 整个下午我们一直在钓鱼,但是我们还没有捉到任何鱼.
解答 10.have been fishing,根据all the afternoon可知钓鱼这动作从过去某一时间开始,并且一直持续到现在,并有可能继续下去,因此使用现在完成进行时,主语we是复数形式,因此答案为have been fishing.
点评 对于单词填空这种题,要分析句子意思,再从结构上和意义上对答案进行确定.

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